Friction-brake.



H. C. G. BRUNT.

FRIGTION BRAKE.

` APPLIOATION FILED APR.15,1908.

1,022,656. Patented A1'1r-9, 1912.

Il l I' l lull ir i ATTORNEY WITNESSES cuLuMElA PLANOORAPH co.,WAsHlNaToN. D. c.

-UNITED STATES PATENT OFFICE.

HENRY C. C. BRUNT, OF COLLINGSWOOD, NEW JERSEY, ASSIGNOR TO VICTORTALKING MACHINE COMPANY, A CORPORATION 0F NEW JERSEY.

FRICTION-BRAKE.

Speeiieaton of Letters Patent.

Patented Apr. 9, 1912.

To all whom t may concern.'

Be it known that I, HENRY C. C. BRUNT, of Collingswood, State of NewJersey, have invented certain new and useful Improvements inFriction-Brakes, of which the following is a full, clear, and exactdescription, reference being had to the accompanying drawings, forming apart of this specification.

My invention relates to improvements in friction brakes in general, andmore specically to friction brakes used in connection with talkingmachines.

The principal obj ect of my invention is to provide a simple andefficient friction brake which may be readily applied to a moving partof a motor or similar mechanism, and easy of operation.

A further object of my invention is to provide a friction brake for usein connec` tion with gramophones and other sound reproducing machines,in which a desirable yielding pressure is applied to the turntable orsound record support of a talking machine; in which the brake member maybe locked out of engagement with the turntable or other moving part of atalking machine; and in which the brake member may be easily placed inand out of engagement with the turn-table or other moving part of amotor or driving mechanism of a talking machine.

A further object of my invention is to provide a friction brake, inwhich the brake member moves slowly and is applied gradually to themoving element, the movement of which is desired to be stopped, thuspreventing the sudden stopping of the moving element, which is veryliable to injure the delicate parts of the operating mechanism.

A further object of my invention is to provide a friction brake, nearlyall the parts of which may be stamped out of sheet metal at a very muchless cost than by casting the same, the method heretofore used in makingthe parts of friction brakes previously used.

With these objects in view, together with other objects which willappear in the following speciiication, my invention consists in theconstruction, combination and arrangement of the parts, such as will behereinafter pointed out in the claims made hereafter.

Referring to the accompanying drawings,

yin which similar reference figures indicate like parts; Figure 1 is aside elevation showing part of the cabinet or casing of a talkingmachine, and a turn-table mounted in the usual manner on the spindle ofa spring motorcontained within said casing, with my improved frictionbrake applied thereto; Fig. 2 is a top plan view illustrating a portionof a talking machine with my improved friction brake applied to theturn-table or sound record support thereof; Fig. 3 is a bottom plan viewof the friction brake showing the positions which the parts take whenthe brake member is applied; Fig. 4 is a bottom plan view showing theposition which the parts take when the brake member is not applied; Fig.5 is a longitudinal sectional view taken on the line 5-5 of Fig. 4; Fig.6 is a longitudinal sectional view taken on the line 6 6 of Fig. 3; andFig. 7 is a detailed view of the brake member.

Referring particularly to the drawings, 1 indicates the cabinet orcasing of a talking machine in which is contained the motor mechanism,by which is rotated the turntable 2, which is mounted in the usualmanner on a driving spindle of the motor; 3 the casing of my improvedfriction brake, which is preferably made of metal, and in which isprovided a slot 4 in which the inner part 5 of the brake member Gmovesand is loosely guided by the sides thereof, and a recess 7 the ends ofwhich determine the points to which the actuating member or cam lever 8may be moved. In the casing 3 are the holes 9-9, through which pass thescrews 10-10, by means of which the casing and the parts carried by itmay be rmly fixed to the casing of a talking machine or other supportingmeans within the casing. Upon the inner surface of the top of saidcasing 3 is provided a screw threaded projection or boss 11, which isadapted to receive the screw or pivot 12, by means of which the movableparts are fastened within the casing 3, and about which, as a pivot, thesaid parts move. The actuating member or cam lever 8 has an inner end 13of suitable width to carry a pin or stud 14, which is adapted to move inthe slot or recess 15 of the brake member 6, and also to provide a hole16 through which passes the pivot 12. The offset 17 of the cam lever 8is of suiiicient elevation so that when the cam lever is moved laterallyabout the pivot 12, it will clear the coiled spring 18 surrounding theouter projection 19 of the brake member 6, the offset 17 terminating ina projection or thumb piece 20. The cam lever 8 is of suitable length sothat the thumb piece 20 will extend through the recess 7, and is withoutthe casing` 3 when the parts of my improved friction brake areassembled.

The brake or reciprocating member 6, of which a detailed view is givenin Fig. 7, has a widened central part 21, in which there is alongitudinal slot 22, through which passes the pivot 12. Thelongitudinal slot 22 is of suit-able length to permit the 'brake member6 to be moved longitudinally the required distance. In one side of theslot 22 is another slot or recess 15, which co-acts with the pin 14 ofthe actuating member in a cam like movement. The lower side of the slotterminates in a notch 23, in which the pin 14 of the actuating member 8becomes seated when it is desired to lock the brake member 6 out ofengagement o-r contact with the turn-table. Extending longitudinallyfrom the widened central portion 21 of the brake member, and in oppositedirections are the projections 19 and 24. The projection 19 is adaptedto pass through the opening 25 in the casing 3, which is diametricallyopposite to the slot 4 in said casing, and the sides of which guide themovement of the said projection 19. Surrounding the said projection 19,one end abutting on the shoulders 26 of the brake member 6,

and the other end abutting on the interior of the casing 3, is a coiledspring 18, the pressure of which tends to throw the brake member 8 intoen agement with the periphery of the turn-table, and to hold it inposition. The projection 24, which passes through the slot 4 of thecasing and extends beyond the said casing, terminates in an upwardlyextending portion 27, in which is placed the brake pad 28, which may beof leather or other suitable material, which is durable and which givesa yielding pressure. The brake pad 28 is suitably mounted within anopening 29 and extends slightly beyond the surface of the up-turnedportion 27. The upper end of 27 is split, forming the ends 30-30, andwhen it is desired to remove o-r replace a brake pad, this may be easilydone by springing apart the ends 30-30, thus enlarging the hole 29. Whenthe brake pad has been replaced, the ends 30-30 will, by the elasticityof the metal, spring together again and hold the brake pad firmly.

The operation of my improved friction brake is as follows: The normalposition of the parts, that is when the brake pad is in contact with theperiphery o-f the turntable, is as shown in Figs. 1, 2, and 3. When itis desired to have the turn-table rotated, the actuating member or camlever 8 is moved to the right, Figs. 1 and 2. The pin 14 of theactuating member 8 moves along the lower edge of the slot 15, exerting adownward pressure thereon, forcing the brake member 6 to movelongitudinally away from the turn-table, and compressing the spring 18.The p'in finally becomes seated in the notch 23, as best shown in Fig.4, and the parts are held firmly locked, a portion of the projection 19of the brake member extending without the casing, and the coiled springbeing compressed between the shoulders 26-26 and the interior of thecasing. Then it is desired to apply the brake member, the actuatingmember or cam leverv 8 is moved to the left, Fig. 2, or to the right,Fig. 4, causing the pin 14 to jump out of the notch 23, releasing thespring 18, which by its pressure throws the brake member forward untilthe brake pad 28 comes in contact with the periphery of the turn-table,thereby causing the turn-table to cease rotating and to be heldmotionless. The distance to which the brake member 6 may thus be movedby the action of the spring 18 is determined by the outer end of theslot 22 coming in contact with the pivot 12, as shown `in Fig. 3. It isnot necessary, however, in the operation of my improved friction brakethat the pivot 12 should be in contact with the end 4of the slot 22 whenthe brake member has been applied to and has stopped the rotation of theturn-table, as the pivot may occupy any intermediate position betweenthe ends of the slot 22, and the brake member still prevent t-heturn-table from rotating. For this reason it is not necessary to employextreme care or accuracy in adjusting the casing with reference to theperiphery of the turn-table. It is only necessary that the casing beiixed in a position in which the brake pad will come in contact with theperiphery of the turntable when the spring 18 is released. l/Vhen thespring 18 is released, throwing the brake member 6 forward, the saidbrake member is4 prevented fro-m being thrown into sudden contact withthe periphery of the turn-table 2 by the action of the pin 14 within theslot 15. The movement of the pin 14, when the lever 8 is moved in eitherdirection, is radially about the pivot 12 as a center, and when thespring 18 is released, the said pin 14 moves from the notch 23 to theinner end of the slo-t 15, as shown in Figs. 2, 3 and 6. It is,therefore, evident that the action of the spring 18 when released, inthrowing forward the brake member G, is retarded by the amount of forcenecessary to cause the pin 14 to move from the outer end of the slotalong the lower side or edge of the said slot until it takes theposition at the inner end of said slot 14, shown in Figs. 2, 3 and 6,the amount of force necessary to accomplish this work being not only toovercome the friction between the said pin 14 and the lower side or edgeof the slot 15, but also the consequent movement of the lever 8 aboutthe pivot 12 from its position as shown in Fig. 4 to the position whichit takes as shown in Figs. 2 and 3. By these means is brought about thegradual movement of the brake member and the brake pad Q8 is thus atfirst brought gently into contact with the periphery of the turn-table2, affording a slight resistance to the rotating movement of theturn-table, which resistance, however, increases gradually until theturn-table is brought to a standstill.

It is obvious that the construction, combination and arrangement of myimproved friction brake, which I have herein described may be used as abrake in connection with any machine or device in which there is. amoving part or element to which the brake pad may be applied. In theaccompanying drawings and in the foregoing description I have, however,sho-wn the application of my improved friction brake to a talkingmachine in which disk sound records are used, but do not limit myself toits use in that connection alone, and, of course, various changes couldbe made in the details of construction illustrated without departingfrom the spirit and scope of my invention.

Having thus described my invention, what I claim and desire to secure byLetters Patent is:

l. In a talking machine brake, the combination with a brake memberhaving a recess, of an actuating member carrying means arranged to bemoved in a rotary path to engage the walls of said recess and to effecta reciprocatory movement of said brake member, means limiting themovement of said brake member', and means adjacent to one end of saidrecess and arranged to lock said member to prevent the relative movementof said brake member and said actuating member.

2. In a talking machine brake, the combination with a brake memberhaving a recess, and a notch, of an actuating member having meansarranged to be shifted in a circular path to engage the walls of saidrecess and to effect a reciprocatory movement of said brake member, andto engage said notch to prevent the accidental relative movement of saidmember.

3. In a friction brake for talking machines, the combination of acasing, a cam lever, a brake member co-acting with said cam lever', aturn-table, a brake pad mounted upon said brake member, and a pinmounted upon said cam lever, said brake member having a notch thereinadapted to receive and firmly hold the said pin, thereby locking thebrake member out of contact with said turn-table.

4L. The combination with a brake member arranged for reciprocation, of alever, a pin carried by said lever arranged to be shifted in an arc toengage a plane surface and reciprocate said brake member by oscillationof said lever, said brake member having a notch disposed to engage saidpin to prevent the accidental relative movement of said member.

5. In a talking machine brake, the combination with a moving element, ofa slo-tted reciprocatory brake member mounted to be brought into contactwith the moving element, a lever, and a pin carried by said leverarranged to be swung in an arc, and to engage the slotted brake memberand shift it toward or away from the moving element, said brake memberbeing provided with a notch for engagement with said pin to preventaccidental relative movement of said lever.

6. In a talking machine brake, the combination with a normally movingelement, of a slotted reciprocatory brake member mounted to be broughtinto contact with said normally moving element, an oscillatory lever anda projection carried by said lever distinct from said reciprocatorybrake member arranged to be shifted within the slot in said brake memberto move it toward and away from the normally moving element, said slotbeing pro-vided with a notch in which said projection is adapted tooperate.

7. In a talking machine brake, the combination with a normally movingelement, of a sheet metal casing, a transversely slotted reciprocatingsheet metal brake member mounted to be brought into contact with thenormally moving element, and a sheet metal lever carrying a pin engagingthe transverse slot in said brake member to move it to-ward or away fromthe moving element, said transverse slot being provided near one endwith a notch adapted to hold said pin to prevent accidental relativemovement of said lever.

8. In a talking machine brake, the combination with a movable brakemember having a slot and a recess extending laterally therefrom, of alever, a pivot for said lever eX- tending through said slot, a pin onsaid lever arranged to be shifted in a circular path thereby, to engagesaid recess and shift said brake member relative to said lever, and anotch situated near one end of said recess for cooperating with said pinto prevent the accidental relative movement between said lever and brakemember.

9. In a talking machine brake, the combination with a movable brakemember having a slot and a recess provided with a notch, extendinglaterally from said slot, of a lever, a pivot for said lever extendingthrough said slot, and a pin on said lever arranged to be shifted in acircular path thereby, to engage said recess and shift said brake memberrelative to said lever, said slot containing a notch to coperate withsaid pin to lock said brake member' in an inoperative position.

10. In a friction brake, the combination of a casing, an actuatingmember, a brake member, coacting With said actuating member and a pinmounted upon said actuating member, said brake member having a notchtherein adapted to receive and firmly hold the said pin, thereby lockingthe brake member.

11. In a. friction brake for talking machines, the combination of acasing, an actuating member, a brake member coacting with said actuatingmember, a moving element in said talking machine, and a pin mounted uponsaid actuating member, said brake member having a notch therein adaptedto receive and hold the said pin, thereby locking the brake member outof contact with said moving element.

l2. In a brake, a casing, a brake member mounted to reciprocate therein,a lever rotatably mounted therein, said brake member having a slottherein, a pin on said lever arranged to be shifted in a circular pathin said slot When said lever is rotated, a spring for holding said brakemember in applied Josition and means for lockino` said brake' member inan inoperative position.

13. In a talking machine brake, the combination With a brake memberhaving a recess, of an actuating member carrying means arranged to beshifted in a rotary path to engage the Walls of said recess and therebyimpart a reciprocatory movement to said brake member, and means Withinsaid recess arranged to limit the movement of said brake member, saidrecess being shaped so as to maintain said actuating member in one eX-treme position.

In Witness whereof I hereunto set my hand this third day of April, 1908.

HENRY C. C. BRUNT.

lVitnesses:

FREDERICK A. BLoUNT, ALEXANDER PARK.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents` Washington, D. C.

